/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.servlet.tags.form;

import javax.servlet.jsp.JspException;

/**
 * Base class for databinding-aware JSP tags that render HTML form input element.
 *
 * <p>Provides a set of properties corresponding to the set of HTML attributes
 * that are common across form input elements.
 *
 * @author Rob Harrop
 * @author Rick Evans
 * @author Juergen Hoeller
 * @since 2.0
 */
@SuppressWarnings("serial")
public abstract class AbstractHtmlInputElementTag extends AbstractHtmlElementTag {

    /**
     * The name of the '{@code onfocus}' attribute.
     */
    public static final String ONFOCUS_ATTRIBUTE = "onfocus";

    /**
     * The name of the '{@code onblur}' attribute.
     */
    public static final String ONBLUR_ATTRIBUTE = "onblur";

    /**
     * The name of the '{@code onchange}' attribute.
     */
    public static final String ONCHANGE_ATTRIBUTE = "onchange";

    /**
     * The name of the '{@code accesskey}' attribute.
     */
    public static final String ACCESSKEY_ATTRIBUTE = "accesskey";

    /**
     * The name of the '{@code disabled}' attribute.
     */
    public static final String DISABLED_ATTRIBUTE = "disabled";

    /**
     * The name of the '{@code readonly}' attribute.
     */
    public static final String READONLY_ATTRIBUTE = "readonly";


    private String onfocus;

    private String onblur;

    private String onchange;

    private String accesskey;

    private boolean disabled;

    private boolean readonly;

    /**
     * Get the value of the '{@code onfocus}' attribute.
     */
    protected String getOnfocus() {
        return this.onfocus;
    }

    /**
     * Set the value of the '{@code onfocus}' attribute.
     * May be a runtime expression.
     */
    public void setOnfocus(String onfocus) {
        this.onfocus = onfocus;
    }

    /**
     * Get the value of the '{@code onblur}' attribute.
     */
    protected String getOnblur() {
        return this.onblur;
    }

    /**
     * Set the value of the '{@code onblur}' attribute.
     * May be a runtime expression.
     */
    public void setOnblur(String onblur) {
        this.onblur = onblur;
    }

    /**
     * Get the value of the '{@code onchange}' attribute.
     */
    protected String getOnchange() {
        return this.onchange;
    }

    /**
     * Set the value of the '{@code onchange}' attribute.
     * May be a runtime expression.
     */
    public void setOnchange(String onchange) {
        this.onchange = onchange;
    }

    /**
     * Get the value of the '{@code accesskey}' attribute.
     */
    protected String getAccesskey() {
        return this.accesskey;
    }

    /**
     * Set the value of the '{@code accesskey}' attribute.
     * May be a runtime expression.
     */
    public void setAccesskey(String accesskey) {
        this.accesskey = accesskey;
    }

    /**
     * Get the value of the '{@code disabled}' attribute.
     */
    protected boolean isDisabled() {
        return this.disabled;
    }

    /**
     * Set the value of the '{@code disabled}' attribute.
     */
    public void setDisabled(boolean disabled) {
        this.disabled = disabled;
    }

    /**
     * Gets the value of the '{@code readonly}' attribute.
     */
    protected boolean isReadonly() {
        return this.readonly;
    }

    /**
     * Sets the value of the '{@code readonly}' attribute.
     */
    public void setReadonly(boolean readonly) {
        this.readonly = readonly;
    }

    /**
     * Adds input-specific optional attributes as defined by this base class.
     */
    @Override
    protected void writeOptionalAttributes(TagWriter tagWriter) throws JspException {
        super.writeOptionalAttributes(tagWriter);

        writeOptionalAttribute(tagWriter, ONFOCUS_ATTRIBUTE, getOnfocus());
        writeOptionalAttribute(tagWriter, ONBLUR_ATTRIBUTE, getOnblur());
        writeOptionalAttribute(tagWriter, ONCHANGE_ATTRIBUTE, getOnchange());
        writeOptionalAttribute(tagWriter, ACCESSKEY_ATTRIBUTE, getAccesskey());
        if (isDisabled()) {
            tagWriter.writeAttribute(DISABLED_ATTRIBUTE, "disabled");
        }
        if (isReadonly()) {
            writeOptionalAttribute(tagWriter, READONLY_ATTRIBUTE, "readonly");
        }
    }

}
